1681073995 has 4 divisors (see below), whose sum is σ = 2017288800. Its totient is φ = 1344859192.

The previous prime is 1681073987. The next prime is 1681074007. The reversal of 1681073995 is 5993701861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1681073995 - 2³ = 1681073987 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168107395 + ... + 168107404.

It is an arithmetic number, because the mean of its divisors is an integer number (504322200).

Almost surely, 2^1681073995 is an apocalyptic number.

1681073995 is a deficient number, since it is larger than the sum of its proper divisors (336214805).

1681073995 is an equidigital number, since it uses as much as digits as its factorization.

1681073995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336214804.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 1681073995 is about 41000.9023681187. The cubic root of 1681073995 is about 1189.0376597035.

The spelling of 1681073995 in words is "one billion, six hundred eighty-one million, seventy-three thousand, nine hundred ninety-five".